In pat the fat, but also to force settle any solids that made it through the filtration.
After 24 hours in the freezer, the vodka was definitely still liquid (vodka doesn't freeze until around -17F or so), but there was a surprisingly thick sludge of mud and "powder"
The other surprising bit: started with 6 oz vodka in 2 oz of nibs - after absorption, settling, freezing, and "mud" loses, I ended up with 3 oz of chocolate extract.